公开(公告)号：US20240187298A1

公开(公告)日：2024-06-06

申请号：US18409482

申请日：2024-01-10

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shlomo Selim Rakib ,  Anton Monk ,  Michail Tsatsanis ,  Yoav Hebron

IPC: H04L27/32

CPC classification number: H04L27/32

Abstract: Orthogonal Time Frequency Space (OTFS) is a novel modulation scheme with significant benefits for 5G systems. The fundamental theory behind OTFS is presented in this paper as well as its benefits. We start with a mathematical description of the doubly fading delay-Doppler channel and develop a modulation that is tailored to this channel. We model the time varying delay-Doppler channel in the time-frequency domain and derive a new domain (the OTFS domain) where we show that the channel is transformed to a time invariant one and all symbols see the same SNR. We explore aspects of the modulation like delay and Doppler resolution, and address design and implementation issues like multiplexing multiple users and evaluating complexity. Finally we present some performance results where we demonstrate the superiority of OTFS.

公开(公告)号：US20210351880A1

公开(公告)日：2021-11-11

申请号：US17443004

申请日：2021-07-19

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Anton Monk ,  Shlomo Selim Rakib ,  Michail Tsatsanis

IPC: H04L5/00 ,  H04L27/26 ,  H04L1/00

Abstract: An Orthogonal Time Frequency Space Modulation (OTFS) modulation scheme achieving multiple access by multiplexing multiple signals at the transmitter-side performs allocation of transmission resources to a first signal and a second signal, combining and converting to a transmission format via OTFS modulation and transmitting the signal over a communication channel. At the receiver, multiplexed signals are recovered using orthogonality property of the basis functions used for the multiplexing at the transmitter.

公开(公告)号：US12184468B2

公开(公告)日：2024-12-31

申请号：US18409482

申请日：2024-01-10

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shlomo Selim Rakib ,  Anton Monk ,  Michail Tsatsanis ,  Yoav Hebron

IPC: H04L27/32

Abstract: Orthogonal Time Frequency Space (OTFS) is a novel modulation scheme with significant benefits for 5G systems. The fundamental theory behind OTFS is presented in this paper as well as its benefits. We start with a mathematical description of the doubly fading delay-Doppler channel and develop a modulation that is tailored to this channel. We model the time varying delay-Doppler channel in the time-frequency domain and derive a new domain (the OTFS domain) where we show that the channel is transformed to a time invariant one and all symbols see the same SNR. We explore aspects of the modulation like delay and Doppler resolution, and address design and implementation issues like multiplexing multiple users and evaluating complexity. Finally we present some performance results where we demonstrate the superiority of OTFS.

公开(公告)号：US12068846B2

公开(公告)日：2024-08-20

申请号：US17443004

申请日：2021-07-19

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Anton Monk ,  Shlomo Selim Rakib ,  Michail Tsatsanis

IPC: H04L5/00 ,  H04L1/00 ,  H04L27/26 ,  H04B7/06 ,  H04L25/03

CPC classification number: H04L1/0023 ,  H04L5/0007 ,  H04L5/0023 ,  H04L27/2639 ,  H04L27/2697 ,  H04B7/06 ,  H04L1/0071 ,  H04L25/03834

Abstract: An Orthogonal Time Frequency Space Modulation (OTFS) modulation scheme achieving multiple access by multiplexing multiple signals at the transmitter-side performs allocation of transmission resources to a first signal and a second signal, combining and converting to a transmission format via OTFS modulation and transmitting the signal over a communication channel. At the receiver, multiplexed signals are recovered using orthogonality property of the basis functions used for the multiplexing at the transmitter.

公开(公告)号：US11894967B2

公开(公告)日：2024-02-06

申请号：US18164872

申请日：2023-02-06

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shlomo Selim Rakib ,  Anton Monk ,  Michail Tsatsanis ,  Yoav Hebron

IPC: H04L27/32

CPC classification number: H04L27/32

Abstract: Orthogonal Time Frequency Space (OTFS) is a novel modulation scheme with significant benefits for 5G systems. The fundamental theory behind OTFS is presented in this paper as well as its benefits. We start with a mathematical description of the doubly fading delay-Doppler channel and develop a modulation that is tailored to this channel. We model the time varying delay-Doppler channel in the time-frequency domain and derive a new domain (the OTFS domain) where we show that the channel is transformed to a time invariant one and all symbols see the same SNR. We explore aspects of the modulation like delay and Doppler resolution, and address design and implementation issues like multiplexing multiple users and evaluating complexity. Finally we present some performance results where we demonstrate the superiority of OTFS.

公开(公告)号：US20230336399A1

公开(公告)日：2023-10-19

申请号：US18164872

申请日：2023-02-06

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shlomo Selim Rakib ,  Anton Monk ,  Michail Tsatsanis ,  Yoav Hebron

IPC: H04L27/32

CPC classification number: H04L27/32

Abstract: Orthogonal Time Frequency Space (OTFS) is a novel modulation scheme with significant benefits for 5G systems. The fundamental theory behind OTFS is presented in this paper as well as its benefits. We start with a mathematical description of the doubly fading delay-Doppler channel and develop a modulation that is tailored to this channel. We model the time varying delay-Doppler channel in the time-frequency domain and derive a new domain (the OTFS domain) where we show that the channel is transformed to a time invariant one and all symbols see the same SNR. We explore aspects of the modulation like delay and Doppler resolution, and address design and implementation issues like multiplexing multiple users and evaluating complexity. Finally we present some performance results where we demonstrate the superiority of OTFS.

公开(公告)号：US20190379422A1

公开(公告)日：2019-12-12

申请号：US16079509

申请日：2017-02-24

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shlomo Selim Rakib ,  Anton Monk ,  Michail Tsatsanis ,  Yoav Hebron

IPC: H04B1/69 ,  H04L5/00 ,  H04L27/26

Abstract: In a wireless communication network, pilot signals are transmitted over a wireless communication channel by determining a maximum delay spread for a transmission channel, determining a maximum Doppler frequency spread for the transmission channel, and allocating a set of transmission resources in a time-frequency domain to a number of pilot signals based on the maximum delay spread and the maximum Doppler frequency spread.

公开(公告)号：US11575557B2

公开(公告)日：2023-02-07

申请号：US17304059

申请日：2021-06-14

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shlomo Selim Rakib ,  Anton Monk ,  Michail Tsatsanis ,  Yoav Hebron

IPC: H04L27/32

Abstract: Orthogonal Time Frequency Space (OTFS) is a novel modulation scheme with significant benefits for 5G systems. The fundamental theory behind OTFS is presented in this paper as well as its benefits. We start with a mathematical description of the doubly fading delay-Doppler channel and develop a modulation that is tailored to this channel. We model the time varying delay-Doppler channel in the time-frequency domain and derive a new domain (the OTFS domain) where we show that the channel is transformed to a time invariant one and all symbols see the same SNR. We explore aspects of the modulation like delay and Doppler resolution, and address design and implementation issues like multiplexing multiple users and evaluating complexity. Finally we present some performance results where we demonstrate the superiority of OTFS.

公开(公告)号：US11070329B2

公开(公告)日：2021-07-20

申请号：US15758322

申请日：2016-09-07

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Anton Monk ,  Shlomo Selim Rakib ,  Michail Tsatsanis

IPC: H04L5/00 ,  H04L27/26 ,  H04L1/00 ,  H04B7/06 ,  H04L25/03

Abstract: An Orthogonal Time Frequency Space Modulation (OTFS) modulation scheme achieving multiple access by multiplexing multiple signals at the transmitter-side performs allocation of transmission resources to a first signal and a second signal, combining and converting to a transmission format via OTFS modulation and transmitting the signal over a communication channel. At the receiver, multiplexed signals are recovered using orthogonality property of the basis functions used for the multiplexing at the transmitter.

公开(公告)号：US11038733B2

公开(公告)日：2021-06-15

申请号：US15776374

申请日：2016-11-17

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shlomo Selim Rakib ,  Anton Monk ,  Michail Tsatsanis ,  Yoav Hebron

IPC: H04L27/26

Abstract: Orthogonal Time Frequency Space (OTFS) is a novel modulation scheme with significant benefits for 5G systems. The fundamental theory behind OTFS is presented in this paper as well as its benefits. We start with a mathematical description of the doubly fading delay-Doppler channel and develop a modulation that is tailored to this channel. We model the time varying delay-Doppler channel in the time-frequency domain and derive a new domain (the OTFS domain) where we show that the channel is transformed to a time invariant one and all symbols see the same SNR. We explore aspects of the modulation like delay and Doppler resolution, and address design and implementation issues like multiplexing multiple users and evaluating complexity. Finally we present some performance results where we demonstrate the superiority of OTFS.